When do we use factor analysis based on Covariance matrix?

Dear researchers, When do we use factor analysis based on Covariance matrix instead of correlation matrix? Hamid

08 September 2018 9,025 5 View

What is difference between Yates' correction and fisher exact test?

What is difference between Yates' correction and fisher exact test? When should I use Yates' correction? And fisher exact test? Best wishes

31 December 2017 2,622 4 View

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10 November 2017 3,627 8 View

How can multivariate normality distribution be elevated when we decide to run exploratory factor analysis?

31 December 2016 829 6 View

How can i estimate the percentage of missing values in my data file in spss?

11 December 2016 4,235 5 View

When we use Second order confirmatory factor analysis?

08 September 2016 6,148 5 View

What is the suitable condition for exploratory factor analysis when internal consistency for all items (alpha Cronbach's) is .41?

Dear researchers and Professors I am going to run exploratory factor analysis for a questionnaire with 16 items. Prior to running an EFA, it was calculated the internal consistency with Cronbach's...

08 September 2016 3,266 7 View

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05 June 2016 2,730 1 View

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05 June 2016 1,994 11 View

What is difference of exploratory factor analysis and principal component analysis?

03 April 2016 6,284 2 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

I got 02 moderator values defining Johnson-Neyman significance regions. Is it an error?

Hi everyone, I am conducting research for my Master's thesis. I am using PROCESS by Johnson-Neyman to analyze my Moderator model. I test the relationship between Public Service Motivation and...

03 March 2021 2,350 2 View

What analysis to choose with a large neste dataset and clearly skewed or kurtotic distributions?

Hello! I have a dataset of n=3000 nested within 8 countries with approximately 200 or 400 responses in each country. I originally planned to perform multilevel modelling with 4 dependent variables...

02 March 2021 6,865 1 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

What SPSS analysis should I run with one IV (with two levels) and two DVs?

Hi, I am trying to figure out which test would be most appropriate to run for the following question: Is there a difference in task blood pressure between smokers and non-smokers? There are two...

01 March 2021 8,235 2 View

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01 March 2021 3,905 5 View

What test should I use to compare two or three means, if data is not normally distributed but sample size is > 30 in each group?

I personally feel this as a most confusing question. As per my understanding, if sample size is > 30, and sample is skewed, we can still use paramteric approach, as it will follow Z...

01 March 2021 1,587 6 View

Is it necessary to report effect size (ES) in statistics of biomedical research given that we already report p values routinely?

Pls share your thoughts

01 March 2021 7,330 4 View

Statistics: include groups of respondents made by one person for analysis?

Good morning, I could not find literature about this so I am asking. I am organizing data for a questionnaire (N=100) that foresees some personal questions like level of education. For the aim...

25 February 2021 2,090 4 View

Why there are two peaks while using the mie plot of Silver nanoparticle?

Hi, I am trying to learn the theoretical modelling of silver nanoparticle using the Mie scattering theory. After that, I discovered a software named Mieplot developed by Philip Laven, where it...

25 February 2021 7,493 6 View